Publications

Reviewing the usage of several variants of high density completion fluid (CF) and searching for products that are operationally safe on well workovers as well as on the formation. Apply the product on a field scale and recommend its use in high pressure formation. CF is not the same as drilling mud although the mud can be used as CF. CF is a clear brine free of solids. There are three types of CF: low density, medium density, and high density. Hi-density CF is required for well operations with high formation pressure to be used in the completion phase, which in this case, common CFs such as CaCL2 and KCl are not able to meet the needs. Due to the limited availability of variants of high-density CF, drilling mud was also used as a CF. Ignoring hi-density CF will result in the proliferation of non-productive time (NPT) and complaints due to formation damage. Wthin the period of 2005 - 2016, several high density CFs have been applied to compound operations, DST or workover phases such as Base Polyphospate, Bromide. However, the continued use of this type of CF raises operational constraints and also affects formation. The disadvantages of using Bromide and Polyphospateis that they are reactive to the formation, cannot be mixed with CaCl2, are highly corrosive (causing leakage to the production string), causes salt depletion, and causes premature sets of completion equipment. This paper discusses the laboratory scale research testing the compability of hi-density CF with nitrate-based on formation and for mixing with CaCl2, with pass result. Conducted in mid-2017 the application was done on the workover of two wells at JRB-01 and JAS-02. The use ofthe hi-density CFs with nitrate-based resulted in the successful completion the wells without any operational constraints and formation issues.